function save() {
    let data={
        userId:sessionStorage.getItem("newUserId"),
        status:$("input:radio[name='status']:checked").val(),
        lateTime:$("#lateTime").val()
    };
    let result = myAjax("/api/stu/student/sign", data, "post");
    if (result.data === 1) {
        //签到成功，就重新查询数据
        alert(result.message);
        x_admin_father_reload();
    } else {
        alert(result.message);
    }
}